Recycled Concrete Aggregate for a 18x40 Parking Pad
How much recycled concrete aggregate for a 18x40 parking pad: at 4 inches deep you need about 8.89 cubic yards, which is roughly 11.6 tons at 1.3 tons per yard. The parking pad covers 720 square feet, so every inch of depth adds about 2.22 yards.
Volume and tonnage calculator →The math for a 18x40 parking pad
- Area: 18 × 40 = 720 sq ft.
- Depth in feet: 4 ÷ 12 = 0.333 ft.
- Cubic feet: 720 × 0.333 = 240.0 cu ft.
- Cubic yards: ÷ 27 = 8.89 yd³.
- Tons: × 1.3 = 11.6 tons.
The volume and tonnage calculator does this for any size.
Recycled concrete aggregate needed by depth
| Depth | Cubic yards | Tons (approx.) | Tons +10% |
|---|---|---|---|
| 3 in | 6.67 | 8.7 | 9.5 |
| 4 in | 8.89 | 11.6 | 12.7 |
| 6 in | 13.33 | 17.3 | 19.1 |
About recycled concrete aggregate
Ask whether the recycled concrete has been screened for rebar and debris. Fresh-crushed concrete can also be alkaline, so keep it away from sensitive plantings and streams. Weight per yard is a planning number; the scale ticket at the yard is the real one.
Preparing the parking pad
Dig out organic soil, compact the subgrade and set an edge so the stone does not migrate onto the lawn. A pad that holds parked weight for long periods benefits from a dense base under the surface stone. Since the parking pad carries parked vehicles, a little extra depth is cheap insurance.
Ordering tips
- Round up. Compaction and uneven ground eat material. Adding about 10 percent is common.
- Delivery size. 12.7 tons fits in a single typical dump truck load; small loads may carry a delivery fee. See how many tons of gravel in a dump truck.
- Bulk vs bags. At this size bulk delivery is usually the practical choice.
- Where it drops. Have the truck dump as close to the parking pad as firm ground allows.
When to choose recycled concrete aggregate
Good uses:
- Driveway and pad bases
- Temporary construction entrances
- Fill under slabs when compacted in lifts
Poor fit for:
- Near ponds, streams or sensitive plants, since fresh crush can raise pH
- Decorative top layers
- Drainage layers, unless the product is clean and screened
Quick reference numbers
- Per inch over 100 sq ft: about 0.40 tons of recycled concrete aggregate (0.31 cubic yards).
- Per inch over 1,000 sq ft: about 4.0 tons.
- Another size for comparison: a 15x30 area at 2 inches takes about 3.6 tons.
- Weight used here: about 1.3 tons per cubic yard.
Common estimating mistakes
- Using inches as if they were feet. Depth has to be divided by 12 before you multiply; skipping that step inflates the order twelvefold.
- Measuring only the main rectangle. Aprons, turnouts and curved edges add real square footage.
- Skipping drainage. Water sitting under any surface softens the base and leads to ruts and potholes.
- Forgetting that compaction shrinks loose material. A loose 4-inch spread of a dense-graded stone may finish closer to 3 inches after rolling.
Questions people ask
How many tons of recycled concrete aggregate for a 18x40 parking pad?
About 11.6 tons at 4 inches deep, or 12.7 tons with 10 percent extra.
How many cubic yards is a 18x40 parking pad at 4 inches?
About 8.89 cubic yards.
How much does a cubic yard of recycled concrete aggregate weigh?
Usually around 1.2 to 1.4 tons, depending on stone size, fines and moisture.
How deep should recycled concrete aggregate be for a parking pad?
The table above shows 3 to 6 inches. Shallower depths suit top dressing; deeper depths suit new installs and heavier use.
How many square feet is 18x40?
720 square feet.
Related guides
- Crushed Stone vs Gravel: Differences and Best Uses
- Tons to Cubic Yards for Gravel: Conversion Chart
- How Many Tons of Gravel in a Dump Truck? Loads and Coverage
- How Much Does a Ton of Gravel Cover? Depth Chart
- Recycled Concrete Aggregate for a 18x30 Parking Pad
- Recycled Concrete Aggregate for a 18x36 Parking Pad
As an Amazon Associate, AsphaltTons.com earns from qualifying purchases. Product links below are sponsored.